Added Typescript definitions file

Tone.d.ts

@@ -0,0 +1,36 @@
+declare module Tone {
+
+    interface Signal{
+
+    }
+
+    interface Oscillator {
+        toMaster(): void;
+        setVolume(volume: number): void;
+        detune: Signal;
+        start(time: number): void;
+        stop(time: number): void;
+        setFrequency(val: number, rampTime:number): void;
+        setType(type: string): void;
+        getType(): string;
+    }
+
+    interface OscillatorFactory {
+        new(frequency: number, type: string): Oscillator;
+        (frequency: number, type: string): Oscillator;
+    }
+
+    var Oscillator: OscillatorFactory;
+
+    interface LFO {
+        start(): void;
+        connect(signal: Signal): void;
+    }
+
+    interface LFOFactory {
+        new(rate: number, outputMin: number, outputMax: number): LFO;
+        (rate: number, outputMin: number, outputMax: number): LFO;
+    }
+
+    var LFO: LFOFactory;
+}